package com.app.bimo.commonbusiness.network;

import java.io.IOException;
import java.io.InputStream;
import java.security.KeyManagementException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.UnrecoverableKeyException;
import java.security.cert.CertificateException;
import java.security.cert.CertificateFactory;
import java.security.cert.X509Certificate;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.KeyManager;
import javax.net.ssl.KeyManagerFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import javax.net.ssl.TrustManagerFactory;
import javax.net.ssl.X509TrustManager;

public class HttpsUtils {
    public static class SSLParams {
        public SSLSocketFactory sSLSocketFactory;
        public X509TrustManager trustManager;
    }

    public static SSLParams getSslSocketFactory(InputStream[] certificates, InputStream bksFile, String password) {
        SSLParams sslParams = new SSLParams();
        try {
            TrustManager[] trustManagers = prepareTrustManager(certificates);
            KeyManager[] keyManagers = prepareKeyManager(bksFile, password);
            SSLContext sslContext = SSLContext.getInstance("TLS");
            X509TrustManager trustManager = null;
//这里使用证书的时候要进行的验证，如果失败的话可以直接走trustManager = new UnSafeTrustManager();
            if (trustManagers != null) {
//                trustManager = new MyTrustManager(chooseTrustManager(trustManagers));
            } else {
                trustManager = new UnSafeTrustManager();
            }
                trustManager = new UnSafeTrustManager();
                sslContext.init(keyManagers, new TrustManager[]{trustManager}, null);
                sslParams.sSLSocketFactory = sslContext.getSocketFactory();
                sslParams.trustManager = trustManager;
                return sslParams;
            } catch (NoSuchAlgorithmException e) {
                throw new AssertionError(e);
            } catch (KeyManagementException e) {
                throw new AssertionError(e);
            }
//        catch (KeyStoreException e) {
//            throw new AssertionError(e);
//        }
        }

        private class UnSafeHostnameVerifier implements HostnameVerifier {
            @Override
            public boolean verify(String hostname, SSLSession session) {
                return true;
            }
        }

        private static class UnSafeTrustManager implements X509TrustManager {
            @Override
            public void checkClientTrusted(X509Certificate[] chain, String authType)
                    throws CertificateException {
            }

            @Override
            public void checkServerTrusted(X509Certificate[] chain, String authType)
                    throws CertificateException {
            }

            @Override
            public X509Certificate[] getAcceptedIssuers() {
                return new X509Certificate[]{};
            }
        }

        private static TrustManager[] prepareTrustManager(InputStream... certificates) {
            if (certificates == null || certificates.length <= 0) return null;
            try {
                CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509");
                KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
                keyStore.load(null);
                int index = 0;
                for (InputStream certificate : certificates) {
                    String certificateAlias = Integer.toString(index++);
                    keyStore.setCertificateEntry(certificateAlias, certificateFactory.generateCertificate(certificate));
                    try {
                        if (certificate != null)
                            certificate.close();
                    } catch (IOException e)
                    {
                    }
                }
                TrustManagerFactory trustManagerFactory = null;
                trustManagerFactory = TrustManagerFactory.
                        getInstance(TrustManagerFactory.getDefaultAlgorithm());
                trustManagerFactory.init(keyStore);
                TrustManager[] trustManagers = trustManagerFactory.getTrustManagers();
                return trustManagers;
            } catch (NoSuchAlgorithmException e) {
                e.printStackTrace();
            } catch (CertificateException e) {
                e.printStackTrace();
            } catch (KeyStoreException e) {
                e.printStackTrace();
            } catch (Exception e) {
                e.printStackTrace();
            }
            return null;
        }
        private static KeyManager[] prepareKeyManager(InputStream bksFile, String password) {
            try {
                if (bksFile == null || password == null) return null;
                KeyStore clientKeyStore = KeyStore.getInstance("BKS");
                clientKeyStore.load(bksFile, password.toCharArray());
                KeyManagerFactory keyManagerFactory = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());
                keyManagerFactory.init(clientKeyStore, password.toCharArray());
                return keyManagerFactory.getKeyManagers();
            } catch (KeyStoreException e) {
                e.printStackTrace();
            } catch (NoSuchAlgorithmException e) {
                e.printStackTrace();
            } catch (UnrecoverableKeyException e) {
                e.printStackTrace();
            } catch (CertificateException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } catch (Exception e) {
                e.printStackTrace();
            }
            return null;
        }
        private static X509TrustManager chooseTrustManager(TrustManager[] trustManagers) {
            for (TrustManager trustManager : trustManagers) {
                if (trustManager instanceof X509TrustManager) {
                    return (X509TrustManager) trustManager;
                }
            }
            return null;
        }
        private static class MyTrustManager implements X509TrustManager {
            private X509TrustManager defaultTrustManager;
            private X509TrustManager localTrustManager;
            public MyTrustManager(X509TrustManager localTrustManager) throws NoSuchAlgorithmException, KeyStoreException {
                TrustManagerFactory var4 = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
                var4.init((KeyStore) null);
                defaultTrustManager = chooseTrustManager(var4.getTrustManagers());
                this.localTrustManager = localTrustManager;
            }
            @Override
            public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
            }
            @Override
            public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
                try {
                    defaultTrustManager.checkServerTrusted(chain, authType);
                } catch (CertificateException ce) {
                    localTrustManager.checkServerTrusted(chain, authType);
                }
            }
            @Override
            public X509Certificate[] getAcceptedIssuers() {
                return new X509Certificate[0];
            }
        }

}
